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Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2012
Compensation and Retirement and Compensation Related Costs, Share-based Payments Disclosure [Abstract]  
Schedule of non-cash compensation expense and capitalized non-cash compensation
The following table summarizes non-cash compensation expense and capitalized non-cash compensation for three months ended March 31, 2012 and 2011 (dollars in millions):
 
Three Months Ended March 31,
 
 
2012
 
2011
 
OSO
$
2

 
$
2

 
Restricted Stock Units and Shares
4

 
4

 
401(k) Match Expense
7

 
3

 
Restricted Stock Unit Bonus Grant
11

 
16

 
 
24

 
25

 
Capitalized Noncash Compensation

 

 
 
$
24

 
$
25